CRTOUCH Datasheet, PDF (36/68 Pages) Freescale Semiconductor, Inc – Capacitive and Resistive Touch Sensing Application Specific IC.

Memory Map and Registers Description
4.2.1.2 Resistive Touch Status register 1
This register reports different events that may be detected in the system, and latches some bits to ensure
that the event does not get lost if not read immediately. Latched bits clear after a register read. The
TouchPending pin is also set after this register is read.
Bit
Field
7
RTST
6
RTS2T
5
RTSZ
4
RTSR
3
RTSS
2
RTSF
1
CTE
0
RTSRDY
Field
Description
7
RTST
Resistive Touch Screen Touched is set after any touch event in a resistive screen is connected to
CRTouch
0 Resistive touch screen not currently touched
1 Resistive touch screen currently touched
6
RTS2T
Resistive touch screen Two Touch detection is set after the screen has a two touch detection event.
This bit is automatically cleared when a two touch condition is no longer detected on the screen.
0 Two touch event not currently detected
1 Two touch currently detected.
5
RTSZ
Resistive Touch Screen Zoom indicates when a zoom gesture has been detected.
0 Zoom gesture not detected
1 Zoom gesture pending for reading
4
RTSR
Resistive Touch Screen Rotate indicates when a rotate gesture has been detected.
0 Rotate gesture not detected
1 Rotate gesture pending for reading
3
RTSS
Resistive Touch Screen Slide indicates when a slide gesture has been detected.
0 Slide gesture not pending for reading
1 Slide gesture pending for reading
2
RTSF
Resistive touch screen FIFO data is set when the FIFO count reaches the watermark value or when
the FIFO is filled.
0 FIFO data ful and watermark reached
1 FIFO data not full and watermark not reached
1
CTE
Capacitive touch event is set after one of the configured capacitive events is detected.
0 Capacitive touch event not pending for reading
1 Capacitive touch event pending for reading
0
RTSRDY
Resistive Touch Sample ready is set after a resistive touch screen connected to CRTouch is pressed
and the device finished all the data processing to determine X and Y coordinates.
0 Resistive touch sample not pending for reading
1 Resistive touch sample pending for reading
CRTouch Data Sheet, Rev. 3
36
Freescale Semiconductor